﻿<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
    <style>
        .div1 {
            background-color: red;
            width: 100px;
        }

        .div2 {
            float: left;
            background-color: blue;
            width: 300px;
        }

        .div3 {
            float: right;
            background-color: aqua;
            width: 300px;
        }

        .p {
            background-color:  burlywood;
        }
    </style>

</head>
<body>
    <div class="div1">div11</div>
    <div class="div2">div22</div>
    <div class="div3">div33</div>
    <p class=" p">p</p>
</body>
</html>